diff options
Diffstat (limited to 'drivers/pinctrl/sh-pfc/core.c')
| -rw-r--r-- | drivers/pinctrl/sh-pfc/core.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/drivers/pinctrl/sh-pfc/core.c b/drivers/pinctrl/sh-pfc/core.c index f1cfcc8c6544..3f989f5cb021 100644 --- a/drivers/pinctrl/sh-pfc/core.c +++ b/drivers/pinctrl/sh-pfc/core.c @@ -571,6 +571,13 @@ static const struct of_device_id sh_pfc_of_table[] = { .compatible = "renesas,pfc-r8a7795", .data = &r8a7795_pinmux_info, }, +#ifdef DEBUG + { + /* For sanity checks only (nothing matches against this) */ + .compatible = "renesas,pfc-r8a77950", /* R-Car H3 ES1.0 */ + .data = &r8a7795es1_pinmux_info, + }, +#endif /* DEBUG */ #endif #ifdef CONFIG_PINCTRL_PFC_R8A7796 { @@ -709,6 +716,128 @@ static int sh_pfc_suspend_init(struct sh_pfc *pfc) { return 0; } #define DEV_PM_OPS NULL #endif /* CONFIG_PM_SLEEP && CONFIG_ARM_PSCI_FW */ +#ifdef DEBUG +static bool is0s(const u16 *enum_ids, unsigned int n) +{ + unsigned int i; + + for (i = 0; i < n; i++) + if (enum_ids[i]) + return false; + + return true; +} + +static unsigned int sh_pfc_errors; +static unsigned int sh_pfc_warnings; + +static void sh_pfc_check_cfg_reg(const char *drvname, + const struct pinmux_cfg_reg *cfg_reg) +{ + unsigned int i, n, rw, fw; + + if (cfg_reg->field_width) { + /* Checked at build time */ + return; + } + + for (i = 0, n = 0, rw = 0; (fw = cfg_reg->var_field_width[i]); i++) { + if (fw > 3 && is0s(&cfg_reg->enum_ids[n], 1 << fw)) { + pr_warn("%s: reg 0x%x: reserved field [%u:%u] can be split to reduce table size\n", + drvname, cfg_reg->reg, rw, rw + fw - 1); + sh_pfc_warnings++; + } + n += 1 << fw; + rw += fw; + } + + if (rw != cfg_reg->reg_width) { + pr_err("%s: reg 0x%x: var_field_width declares %u instead of %u bits\n", + drvname, cfg_reg->reg, rw, cfg_reg->reg_width); + sh_pfc_errors++; + } + + if (n != cfg_reg->nr_enum_ids) { + pr_err("%s: reg 0x%x: enum_ids[] has %u instead of %u values\n", + drvname, cfg_reg->reg, cfg_reg->nr_enum_ids, n); + sh_pfc_errors++; + } +} + +static void sh_pfc_check_info(const struct sh_pfc_soc_info *info) +{ + const struct sh_pfc_function *func; + const char *drvname = info->name; + unsigned int *refcnts; + unsigned int i, j, k; + + pr_info("Checking %s\n", drvname); + + /* Check groups and functions */ + refcnts = kcalloc(info->nr_groups, sizeof(*refcnts), GFP_KERNEL); + if (!refcnts) + return; + + for (i = 0; i < info->nr_functions; i++) { + func = &info->functions[i]; + for (j = 0; j < func->nr_groups; j++) { + for (k = 0; k < info->nr_groups; k++) { + if (!strcmp(func->groups[j], + info->groups[k].name)) { + refcnts[k]++; + break; + } + } + + if (k == info->nr_groups) { + pr_err("%s: function %s: group %s not found\n", + drvname, func->name, func->groups[j]); + sh_pfc_errors++; + } + } + } + + for (i = 0; i < info->nr_groups; i++) { + if (!refcnts[i]) { + pr_err("%s: orphan group %s\n", drvname, + info->groups[i].name); + sh_pfc_errors++; + } else if (refcnts[i] > 1) { + pr_err("%s: group %s referred by %u functions\n", + drvname, info->groups[i].name, refcnts[i]); + sh_pfc_warnings++; + } + } + + kfree(refcnts); + + /* Check config register descriptions */ + for (i = 0; info->cfg_regs && info->cfg_regs[i].reg; i++) + sh_pfc_check_cfg_reg(drvname, &info->cfg_regs[i]); +} + +static void sh_pfc_check_driver(const struct platform_driver *pdrv) +{ + unsigned int i; + + pr_warn("Checking builtin pinmux tables\n"); + + for (i = 0; pdrv->id_table[i].name[0]; i++) + sh_pfc_check_info((void *)pdrv->id_table[i].driver_data); + +#ifdef CONFIG_OF + for (i = 0; pdrv->driver.of_match_table[i].compatible[0]; i++) + sh_pfc_check_info(pdrv->driver.of_match_table[i].data); +#endif + + pr_warn("Detected %u errors and %u warnings\n", sh_pfc_errors, + sh_pfc_warnings); +} + +#else /* !DEBUG */ +static inline void sh_pfc_check_driver(struct platform_driver *pdrv) {} +#endif /* !DEBUG */ + static int sh_pfc_probe(struct platform_device *pdev) { #ifdef CONFIG_OF @@ -840,6 +969,7 @@ static struct platform_driver sh_pfc_driver = { static int __init sh_pfc_init(void) { + sh_pfc_check_driver(&sh_pfc_driver); return platform_driver_register(&sh_pfc_driver); } postcore_initcall(sh_pfc_init); |